Mulligan, Jessica; Patrovsky, Bridgette.Developing Online Games: An Insider's Guide (англ.). — New Riders, 2003. — P. 474, 477. — ISBN 1-59273-000-0.. — «[pp. 474] experience points A point value that is accumulated by gameplay activity such as leveling and is used as a measure of a character's power. Popularized by the classic dice version of TSR's Advanced Dungeons & Dragons back in the 1970s and carried over to online gaming by designers. [pp. 477] level A rank or rating of a character's power. [...] leveling Activity in-game devoted to increasing a character's experience, level, and/or skills. Leveling usually consists of killing mobs.».
Mulligan, Jessica; Patrovsky, Bridgette.Developing Online Games: An Insider's Guide (англ.). — New Riders, 2003. — P. 447. — ISBN 1-59273-000-0.. — «1985 [...] "My memory says that Island of Kesmai went live on CompuServe on December 15, 1985, after a very long internal test. The price was actually $6 an hour for 300 baud, $12 for 1200 baud. Serious players paid the bucks."—Kelton Flinn[англ.]».
Riad Chikhani (October 31, 2015), Techcrunch, The History Of Gaming: An Evolving Community, [1]Архивная копия от 22 февраля 2018 на Wayback Machine
(February 5, 2008), Smart mobile device shipments hit 118 million in 2007, up 53% on 2006, [2]Архивная копия от 1 июля 2016 на Wayback Machine
Anrufen Online (неопр.). Дата обращения: 23 марта 2017. Архивировано из оригинала 5 июня 2017 года.
wikipedia.org
en.wikipedia.org
Castronova, Edward[англ.]. Synthetic Worlds: The Business and Culture of Online Games (англ.). — University Of Chicago Press, 2006. — P. 10, 291. — ISBN 0-226-09626-2.. — «[pp. 10] The ancestors of MMORPGS were text-based multiuser domains (MUDs) [...] [pp. 291] Indeed, MUDs generate perhaps the one historical connection between game-based VR and the traditional program [...]».
Bainbridge, William Sims. Berkshire Encyclopedia of Human-Computer Interaction (англ.). — Berkshire Publishing Group[англ.], 2004. — Vol. 2. — P. 474. — ISBN 0-9743091-2-5.. — «Developers had long considered writing a graphical MUD. [...] the last major 2D virtual environment in the West marked the true beginning of the fifth age of MUDs: Origin Systems' 1997 Ultima Online (UO).».
Mulligan, Jessica; Patrovsky, Bridgette.Developing Online Games: An Insider's Guide (англ.). — New Riders, 2003. — P. 447. — ISBN 1-59273-000-0.. — «1985 [...] "My memory says that Island of Kesmai went live on CompuServe on December 15, 1985, after a very long internal test. The price was actually $6 an hour for 300 baud, $12 for 1200 baud. Serious players paid the bucks."—Kelton Flinn[англ.]».
